Best friend's to me, but to her what are we??? both girls?

Well my best friend stayed with me the other night, and we were supposed to sleep in this arrangement, I was supposed to sleep on the bed in the den and she was gonna sleep in my twin bed well. we went down in the living room to watch a movie. well it was freezing cold in their so me and her got a cover, it was small so we had to sit close together well as the movie went on she laid her head on my shoulder and fell asleep. is that normal for friends to do that? were 15.. anyway later on she laid down and took her head off me. so i set their for awhile then i laid on her stomach, and then later i got up and got another cover bc that's were we were ganna sleep since she was already laying down. well i took the cushions off the couch and layd down beside her and for some reason she didn't scoot over as far as she could have and i was all up on her. well then she put her feet over mine and her legs over mine a little bit and i was like wow anyway we were kinda cuddling all night what does this mean ? is she bi ?